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Buckling optimization of curved grid-stiffened helicoidal composite panel including the factor of mode shape in multiple load cases.
- Source :
-
Composite Structures . Oct2023, Vol. 322, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- The buckling mode of helicoidal composite panel are non-axisymmetric, resulting its different capability to resist loads in different orientation and the irregular buckling mode after curvilinearly stiffened. A method was proposed to design asymmetric curved stiffeners considering the local displacement gradient of the buckling mode shape. The displacement gradient depends on the bending stiffness and yields a better optimization. The basic unit of the stiffener family includes two stiffeners that pass through the midpoint of the panel; the remainder can be formed from this unit via translation. A simply supported curved grid-stiffened panel using uniaxial compression or shear loads under multiple load cases was addressed, and an integrated design framework was developed to obtain the designs. The curved grid-stiffened helicoidal composite panel yields a weight reduction of up to 13.26% compared to angle-grid designs under uniaxial compression and 11.68% for shear loads in multiple load cases. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MODE shapes
*MECHANICAL buckling
*COMPRESSION loads
Subjects
Details
- Language :
- English
- ISSN :
- 02638223
- Volume :
- 322
- Database :
- Academic Search Index
- Journal :
- Composite Structures
- Publication Type :
- Academic Journal
- Accession number :
- 170047084
- Full Text :
- https://doi.org/10.1016/j.compstruct.2023.117383